If the official wisdom on the collapses is wrong, as I believe it is
So, the story is factual as reported but, he's an economist, not a structural/demo expert. Sounds like he's got an axe to grind. Or he's pushing for a book deal.
His opinion pieces and ideas have been published in The Wall Street Journal, Newsweek, The Washington Times, The Washington Post, The New York Times, National Journal, Investor's Business Daily, Houston Chronicle, Dallas Morning News and other papers across the country. He has appeared on the Newshour with Jim Lehrer on PBS, NBC Nightly News, MSNBC's Hardball with Chis Matthews, CNN's Both Sides with Jesse Jackson, FOX News Channel and C-Span.
FDNY fire fighters still remain under a tight government gag order to not discuss the explosions they heard, felt and saw. FAA personnel are also under a similar 9/11 gag order.